SENSOR ARRANGEMENT FOR DETECTING MOISTURE ON A WINDOW
First Claim
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1. A sensor arrangement for detecting moisture and/or drops of water on a surface of a window, the sensor arrangement comprising:
- a printed circuit board;
a measuring capacitor provided on the printed circuit board for detecting moisture and/or drops;
an analysis unit; and
a second capacitor whose field lines extend into the window and is arranged on the window in order to compensate for temperature differences.
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Abstract
An especially simple and economical moisture sensor with temperature compensation is provided. To this end, in addition to a measuring capacitor, a second capacitor is arranged on a window of a motor vehicle, wherein the second capacitor is not affected by the moisture and/or water droplets. For analysis, a differential measurement of the capacitances of the measuring capacitor and of the second capacitor is carried out, from which is determined a degree of wetting of the window not influenced by the window temperature.
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Citations
6 Claims
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1. A sensor arrangement for detecting moisture and/or drops of water on a surface of a window, the sensor arrangement comprising:
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a printed circuit board; a measuring capacitor provided on the printed circuit board for detecting moisture and/or drops; an analysis unit; and a second capacitor whose field lines extend into the window and is arranged on the window in order to compensate for temperature differences. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification